Alright, I've had a Jardini for over 3 months now in a 29 gallon tank. He's been with 7 clown loaches and been okay, but reading the past few pages, I'm aware that he's going to have some of his own meals potentially. My question is, how long do they take to grow past 18 inches? I have a 130 gallon tank that is empty and he'll eventually grow in.